Finite time calculations for hard parton production relevant to the quark-gluon plasma

High Energy Particle Physics Workshop 2015

Meiring, Ben^1 ; Horowitz, W.A.^1

Department of Physics, University of Cape Town, Private Bag X3, Rondebosch

7701, South Africa^1

关键词: Conditional expectation;    Energy-momentum tensor;    Finite time calculations;    High-energy collisions;    Initial conditions;    Quark-gluon plasma;    Scalar field theory;    Strongly coupled plasma;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/645/1/012006/pdf
DOI  :  10.1088/1742-6596/645/1/012006

来源: IOP

【 摘 要 】

AdS/CFT computations have been used to describe the energy loss of QCD-like particles moving through a strongly coupled plasma, but little is understood regarding the initial conditions of these jets. We use the Schwinger-Keldysh finite-time formalism applied to an interacting scalar field theory to derive perturbative expressions detailing the system which exists during the initial stages of a high energy collision. In this paper we calculate φ(x) for a scalar Yukawa model, demonstrate the finiteness of the energy momentum tensor for λφ4to leading order, and derive an expression for the conditional expectation value of operators to aid in the description jet-like behaviour in interacting theories.